ARUP's Laboratory Test Directory

0050462: Coxiella burnetii (Q-Fever) Antibody IgG, Phase I & II by IFA

Test Mnemonic: Q-F 1,2
Methodology: Indirect Fluorescent Antibody

Performed: Tue, Fri

Reported: 1-5 days

Specimen Required:  
Collect: One 4 mL SST.

Transport: 1 mL serum at 2-8°C. (Min: 0.5 mL)  Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport: 0.15 mL serum at 2-8°C.

Remarks: Separate serum from cells ASAP. Acute and convalescent specimens should be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Please mark specimen plainly as "acute" and "convalescent."

Unacceptable Conditions: Severely lipemic, hemolyzed, or contaminated specimens.

Stability: After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)

Reference Interval:
Phase I: < 1:16 No antibody detected.
Phase II: < 1:16 No antibody detected.

Interpretive Data:
Single phase II IgG titers of 1:256 and greater are considered evidence of C. burnetii infection at some time prior to the date of the serum specimen. Phase I antibody titers of 1:16 and greater are consistent with chronic infection or convalescent phase of Q-fever.



CPT Code(s):
86638 Q-Fever Phase I; 86638 Q-Fever Phase II

 

 

 
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